Offspring Fling runs solely off of the CPU since it is all software rendering. I have been looking into options to fix this in the future though, but I can't make any solid promises for the time being. I know some people are suffering performance problems and it's really at the mercy of Adobe AIR and their system configurations. Sorry! :(

The game is mostly on the CPU, yes, so the processor has a huge effect on if it runs well. Sometimes the controller support causes issues on some computers, so disabling that might bring your frame rate up slightly.

Sorry about that :( If you're experiencing frame rates below 10, I would assume that it's actually being caused by the controller extension freaking out. This happens on certain hardware configurations -- the way around it is to disable the in game controller support and use something like joy2key to play instead. Try using the instructions in the readme to disable the controller extension in the game: http://offspringfling.com/ReadmeOnline.html#controller